Make AM log level configurable

Documentation/api.md

@@ -92,6 +92,7 @@ Specification of the desired behavior of the Alertmanager cluster. More info: ht
 | baseImage | Base image that is used to deploy pods, without tag. | string | false |
 | imagePullSecrets | An optional list of references to secrets in the same namespace to use for pulling prometheus and alertmanager images from registries see http://kubernetes.io/docs/user-guide/images#specifying-imagepullsecrets-on-a-pod | [][v1.LocalObjectReference](https://v1-6.docs.kubernetes.io/docs/api-reference/v1.6/#localobjectreference-v1-core) | false |
 | secrets | Secrets is a list of Secrets in the same namespace as the Alertmanager object, which shall be mounted into the Alertmanager Pods. The Secrets are mounted into /etc/alertmanager/secrets/<secret-name>. | []string | false |
+| logLevel | Log level for Alertmanager to be configured with. | string | false |
 | replicas | Size is the expected size of the alertmanager cluster. The controller will eventually make the size of the running cluster equal to the expected size. | *int32 | false |
 | storage | Storage is the definition of how storage will be used by the Alertmanager instances. | *[StorageSpec](#storagespec) | false |
 | externalUrl | The external URL the Alertmanager instances will be available under. This is necessary to generate correct URLs. This is necessary if Alertmanager is not served from root of a DNS name. | string | false |
@@ -203,7 +204,7 @@ Specification of the desired behavior of the Prometheus cluster. More info: http
 | imagePullSecrets | An optional list of references to secrets in the same namespace to use for pulling prometheus and alertmanager images from registries see http://kubernetes.io/docs/user-guide/images#specifying-imagepullsecrets-on-a-pod | [][v1.LocalObjectReference](https://v1-6.docs.kubernetes.io/docs/api-reference/v1.6/#localobjectreference-v1-core) | false |
 | replicas | Number of instances to deploy for a Prometheus deployment. | *int32 | false |
 | retention | Time duration Prometheus shall retain data for. | string | false |
-| logLevel | Log level for Prometheus be configured in. | string | false |
+| logLevel | Log level for Prometheus to be configured with. | string | false |
 | scrapeInterval | Interval between consecutive scrapes. | string | false |
 | evaluationInterval | Interval between consecutive evaluations. | string | false |
 | externalLabels | The labels to add to any time series or alerts when communicating with external systems (federation, remote storage, Alertmanager). | map[string]string | false |

example/prometheus-operator-crd/alertmanager.crd.yaml

@@ -1280,6 +1280,9 @@ spec:
                 so that it does not bind against the Pod IP. Note this is only for
                 the Alertmanager UI, not the gossip communication.
               type: boolean
+            logLevel:
+              description: Log level for Alertmanager to be configured with.
+              type: string
             nodeSelector:
               description: Define which Nodes the Pods are scheduled on.
               type: object

example/prometheus-operator-crd/prometheus.crd.yaml

@@ -1340,7 +1340,7 @@ spec:
                 so that it does not bind against the Pod IP.
               type: boolean
             logLevel:
-              description: Log level for Prometheus be configured in.
+              description: Log level for Prometheus to be configured with.
               type: string
             nodeSelector:
               description: Define which Nodes the Pods are scheduled on.

pkg/alertmanager/statefulset.go

@@ -194,6 +194,10 @@ func makeStatefulSetSpec(a *monitoringv1.Alertmanager, config Config) (*appsv1.S
 	}
 	amArgs = append(amArgs, fmt.Sprintf("--web.route-prefix=%v", webRoutePrefix))
 
+	if a.Spec.LogLevel != "" && a.Spec.LogLevel != "info" {
+		amArgs = append(amArgs, fmt.Sprintf("--log.level=%s", a.Spec.LogLevel))
+	}
+
 	localReloadURL := &url.URL{
 		Scheme: "http",
 		Host:   "localhost:9093",

pkg/client/monitoring/v1/openapi_generated.go

@@ -245,6 +245,13 @@ func GetOpenAPIDefinitions(ref common.ReferenceCallback) map[string]common.OpenA
 								},
 							},
 						},
+						"logLevel": {
+							SchemaProps: spec.SchemaProps{
+								Description: "Log level for Alertmanager to be configured with.",
+								Type:        []string{"string"},
+								Format:      "",
+							},
+						},
 						"replicas": {
 							SchemaProps: spec.SchemaProps{
 								Description: "Size is the expected size of the alertmanager cluster. The controller will eventually make the size of the running cluster equal to the expected size.",
@@ -733,7 +740,7 @@ func GetOpenAPIDefinitions(ref common.ReferenceCallback) map[string]common.OpenA
 						},
 						"logLevel": {
 							SchemaProps: spec.SchemaProps{
-								Description: "Log level for Prometheus be configured in.",
+								Description: "Log level for Prometheus to be configured with.",
 								Type:        []string{"string"},
 								Format:      "",
 							},

pkg/client/monitoring/v1/types.go

@@ -75,7 +75,7 @@ type PrometheusSpec struct {
 	Replicas *int32 `json:"replicas,omitempty"`
 	// Time duration Prometheus shall retain data for.
 	Retention string `json:"retention,omitempty"`
-	// Log level for Prometheus be configured in.
+	// Log level for Prometheus to be configured with.
 	LogLevel string `json:"logLevel,omitempty"`
 	// Interval between consecutive scrapes.
 	ScrapeInterval string `json:"scrapeInterval,omitempty"`
@@ -410,6 +410,8 @@ type AlertmanagerSpec struct {
 	// object, which shall be mounted into the Alertmanager Pods.
 	// The Secrets are mounted into /etc/alertmanager/secrets/<secret-name>.
 	Secrets []string `json:"secrets,omitempty"`
+	// Log level for Alertmanager to be configured with.
+	LogLevel string `json:"logLevel,omitempty"`
 	// Size is the expected size of the alertmanager cluster. The controller will
 	// eventually make the size of the running cluster equal to the expected
 	// size.